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js 验证身份证合法性

2013年08月21日 ⁄ 综合 ⁄ 共 3819字 ⁄ 字号 评论关闭

  function checkCardId(socialNo){  
      
          if(socialNo == "")  
          {  
            alert("输入身份证号码不能为空!");  
            return (false);  
          }  
      
          if (socialNo.length != 15 && socialNo.length != 18)  
          {  
            alert("输入身份证号码格式不正确!");  
            return (false);  
          }  
              
         var area={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"}; 
 
             
           if(area[parseInt(socialNo.substr(0,2))]==null) {  
            alert("身份证号码不正确(地区非法)!");  
                return (false);  
           }   
                  
          if (socialNo.length == 15)  
          {  
             pattern= /^\d{15}$/;  
             if (pattern.exec(socialNo)==null){  
                alert("15位身份证号码必须为数字!");  
                return (false);  
            }  
            var birth = parseInt("19" + socialNo.substr(6,2));  
            var month = socialNo.substr(8,2);  
            var day = parseInt(socialNo.substr(10,2));  
            switch(month) {  
                case '01':  
                case '03':  
                case '05':  
                case '07':  
                case '08':  
                case '10':  
                case '12':  
                    if(day>31) {  
                        alert('输入身份证号码不格式正确!');  
                        return false;  
                    }  
                    break;  
                case '04':  
                case '06':  
                case '09':  
                case '11':  
                    if(day>30) {  
                        alert('输入身份证号码不格式正确!');  
                        return false;  
                    }  
                    break;  
                case '02':  
                    if((birth % 4 == 0 && birth % 100 != 0) || birth % 400 == 0) {  
                        if(day>29) {  
                            alert('输入身份证号码不格式正确!');  
                            return false;  
                        }  
                    } else {  
                        if(day>28) {  
                            alert('输入身份证号码不格式正确!');  
                            return false;  
                        }  
                    }  
                    break;  
                default:  
                    alert('输入身份证号码不格式正确!');  
                    return false;  
            }  
            var nowYear = new Date().getYear();  
            if(nowYear - parseInt(birth)<15 || nowYear - parseInt(birth)>100) {  
                alert('输入身份证号码不格式正确!');  
                return false;  
            }  
            return (true);  
          }  
            
          var Wi = new Array(  
                    7,9,10,5,8,4,2,1,6,  
                    3,7,9,10,5,8,4,2,1  
                    );  
          var   lSum        = 0;  
          var   nNum        = 0;  
          var   nCheckSum   = 0;  
            
            for (i = 0; i < 17; ++i)  
            {  
                  
      
                if ( socialNo.charAt(i) < '0' || socialNo.charAt(i) > '9' )  
                {  
                    alert("输入身份证号码格式不正确!");  
                    return (false);  
                }  
                else  
                {  
                    nNum = socialNo.charAt(i) - '0';  
                }  
                 lSum += nNum * Wi[i];  
            }  
      
            
            if( socialNo.charAt(17) == 'X' || socialNo.charAt(17) == 'x')  
            {  
                lSum += 10*Wi[17];  
            }  
            else if ( socialNo.charAt(17) < '0' || socialNo.charAt(17) > '9' )  
            {  
                alert("输入身份证号码格式不正确!");  
                return (false);  
            }  
            else  
            {  
                lSum += ( socialNo.charAt(17) - '0' ) * Wi[17];  
            }  
      
              
              
            if ( (lSum % 11) == 1 )  
            {  
                return true;  
            }  
            else  
            {  
                alert("输入身份证号码格式不正确!");  
                return (false);  
            }  
              
    } 

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